﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Profile;
using System.Web.Mvc;
using System.Web.Routing;
using System.Web.Security;
using ECSE6770.Models;

namespace ECSE6770.Controllers
{
    [RequireHttps]
    public class AccountController : BaseController
    {
        //
        // GET: /Account/LogOn

        public ActionResult LogOn()
        {
            return View();
        }

        //
        // POST: /Account/LogOn

        [HttpPost]
        public ActionResult LogOn(LogOnModel model, string returnUrl)
        {
            if (ModelState.IsValid)
            {
                if (Membership.ValidateUser(model.UserName, model.Password))
                {
                    FormsAuthentication.SetAuthCookie(model.UserName, model.RememberMe);
                    if (Url.IsLocalUrl(returnUrl) && returnUrl.Length > 1 && returnUrl.StartsWith("/")
                        && !returnUrl.StartsWith("//") && !returnUrl.StartsWith("/\\"))
                    {
                        return Redirect(returnUrl);
                    }
                    else
                    {
                        return RedirectToAction("Index", "Home");
                    }
                }
                else
                {
                    ModelState.AddModelError("", "The user name or password provided is incorrect.");
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }

        //
        // GET: /Account/LogOff

        public ActionResult LogOff()
        {
            FormsAuthentication.SignOut();

            return RedirectToAction("Index", "Home");
        }

        //
        // GET: /Account/Register

        public ActionResult Register()
        {
            return View();
        }

        //
        // POST: /Account/Register

        [HttpPost]
        public ActionResult Register(RegisterModel model)
        {
            if (ModelState.IsValid)
            {
                // Attempt to register the user
                MembershipCreateStatus createStatus;
                Membership.CreateUser(model.UserName, model.Password, model.Email, null, null, true, null, out createStatus);

                if (createStatus == MembershipCreateStatus.Success)
                {
                    //also need to create a UserInterop object
                    Db.UserInterops.Add(new UserInterop { UserName = model.UserName });
                    Db.SaveChanges();
                    FormsAuthentication.SetAuthCookie(model.UserName, false /* createPersistentCookie */);
                    return RedirectToAction("Index", "Home");
                }
                else
                {
                    ModelState.AddModelError("", ErrorCodeToString(createStatus));
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }

        //
        // GET: /Account/ChangePassword

        [Authorize]
        public ActionResult ChangePassword()
        {
            return View();
        }

        //
        // POST: /Account/ChangePassword

        [Authorize]
        [HttpPost]
        public ActionResult ChangePassword(ChangePasswordModel model)
        {
            if (ModelState.IsValid)
            {

                // ChangePassword will throw an exception rather
                // than return false in certain failure scenarios.
                bool changePasswordSucceeded;
                try
                {
                    MembershipUser currentUser = Membership.GetUser(User.Identity.Name, true /* userIsOnline */);
                    changePasswordSucceeded = currentUser.ChangePassword(model.OldPassword, model.NewPassword);
                }
                catch (Exception)
                {
                    changePasswordSucceeded = false;
                }

                if (changePasswordSucceeded)
                {
                    return Success("Change Password", "Your password has been successfully changed.");
                }
                else
                {
                    ModelState.AddModelError("", "The current password is incorrect or the new password is invalid.");
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }

        //
        // GET: /Account/ChangePasswordSuccess

        public ActionResult Success()
        {
            return View();
        }

        [Authorize]
        public ActionResult EditProfile(string id)
        {
            EditProfileModel model = null;
            if (!String.IsNullOrWhiteSpace(id))
            {
                if ((id == SuperAdminUserName) && (!IsSuperAdmin))
                    throw new HttpException(403, "Unable to edit super admin account.");
                else if (User.IsInRole("Admin"))
                {
                    ViewBag.BindModelAs = id;
                    model = new EditProfileModel(id);
                }
                else
                    throw new HttpException(403, "Editing other users requires admin permissions.");
            }
            else
                model = new EditProfileModel(User.Identity.Name);

            return View(model);
        }

        [Authorize]
        [HttpPost]
        public ActionResult EditProfile(EditProfileModel model)
        {
            if (PerformEditProfile(model))
            {
                if (model.UserName == User.Identity.Name)
                    return Success("Contact Information", "Your contact information has been successfully changed.");
                else
                    return Success("Contact Information", String.Format("Contact information for {0} has been successfully changed.", model.UserName)); 
            }
            else
                return View(model);
        }

        [Authorize]
        public ActionResult RegEditProfile(int id)
        {
            ViewBag.IntroText = "Before registering for a module, please provide your basic contact information.";
            return View("EditProfile", new EditProfileModel(ContextManager.CurrentUser.UserName));
        }

        [Authorize]
        [HttpPost]
        public ActionResult RegEditProfile(EditProfileModel model)
        {
            if (PerformEditProfile(model))
                return RedirectToAction("AddModule", "Cart", this.RouteData.Values);
            else
                return View(model);
        }

        private bool PerformEditProfile(EditProfileModel model)
        {
            if (ModelState.IsValid)
            {
                model.Save();
                //sort out the roles for the user
                if (IsAdmin && !model.IsSuperAdmin)
                {
                    //disabled checkboxes don't get POSTed, so we need to make sure we don't screw admins
                    if (model.IsAdmin && !IsSuperAdmin)
                    {
                        var plusAdmin = new List<string>(model.EditedRoles ?? new string[0]);
                        plusAdmin.Add("Admin");
                        model.EditedRoles = plusAdmin.ToArray();
                    }
                    model.UpdateRoles();
                }
                return true;
            }
            else
                return false;
        }

        #region Status Codes
        private static string ErrorCodeToString(MembershipCreateStatus createStatus)
        {
            // See http://go.microsoft.com/fwlink/?LinkID=177550 for
            // a full list of status codes.
            switch (createStatus)
            {
                case MembershipCreateStatus.DuplicateUserName:
                    return "User name already exists. Please enter a different user name.";

                case MembershipCreateStatus.DuplicateEmail:
                    return "A user name for that e-mail address already exists. Please enter a different e-mail address.";

                case MembershipCreateStatus.InvalidPassword:
                    return "The password provided is invalid. Please enter a valid password value.";

                case MembershipCreateStatus.InvalidEmail:
                    return "The e-mail address provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.InvalidAnswer:
                    return "The password retrieval answer provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.InvalidQuestion:
                    return "The password retrieval question provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.InvalidUserName:
                    return "The user name provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.ProviderError:
                    return "The authentication provider returned an error. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

                case MembershipCreateStatus.UserRejected:
                    return "The user creation request has been canceled. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

                default:
                    return "An unknown error occurred. Please verify your entry and try again. If the problem persists, please contact your system administrator.";
            }
        }
        #endregion
    }
}
